linux-kernel - Re: [PATCH v4 03/11] fs: Initial atomic write support

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Date: Mon, 26 Feb 2024 14:43:21 +0530
From: Ritesh Harjani (IBM) <ritesh.list@...il.com>
To: John Garry <john.g.garry@...cle.com>, axboe@...nel.dk, kbusch@...nel.org, hch@....de, sagi@...mberg.me, jejb@...ux.ibm.com, martin.petersen@...cle.com, djwong@...nel.org, viro@...iv.linux.org.uk, brauner@...nel.org, dchinner@...hat.com, jack@...e.cz
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org, linux-fsdevel@...r.kernel.org, tytso@....edu, jbongio@...gle.com, linux-scsi@...r.kernel.org, ojaswin@...ux.ibm.com, linux-aio@...ck.org, linux-btrfs@...r.kernel.org, io-uring@...r.kernel.org, nilay@...ux.ibm.com, Prasad Singamsetty <prasad.singamsetty@...cle.com>
Subject: Re: [PATCH v4 03/11] fs: Initial atomic write support

John Garry <john.g.garry@...cle.com> writes:

> On 24/02/2024 18:20, Ritesh Harjani (IBM) wrote:
>>>> Helper function atomic_write_valid() can be used by FSes to verify
>>>> compliant writes.
>> Minor nit.
>> maybe generic_atomic_write_valid()?
>
> Having "generic" in the name implies that there are other ways in which 
> we can check if an atomic write is valid, but really this function 
> should be good to use in scenarios so far considered.

It means individual FS can call in a generic atomic write validation
helper instead of implementing of their own. Hence generic_atomic_write_valid(). 

So for e.g. blkdev_atomic_write_valid() function and maybe iomap (or
ext4 or xfs) can use a generic_atomic_write_valid() helper routine to
validate an atomic write request.

-ritesh